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J. E. WEST.' MEGHANIGAL MOTOR.

No. 505,339. Patented Sept. 19, 1893.

(No Model.)

WITNESSES. INVENTOH UNITED STATES PATENT OFFICE.

JOHN E. WEST, OF CENTRALIA, WASHINGTON, ASSIGNOR TO HIMSELF AND MAGGIEJ. HORR, OF SAME PLACE.

MECHANICAL MOTOR.

SPECIFICATION forming part of Letters Patent No. 505,339, datedSeptember 19, 1893. Application filed February 18,1893. Seriall lo.462,861. (No model.)

To all whom it, may concern:

Be it known that 1, JOHN E. WEST, of Gentral1a, in the county of Lewisand State of Washington, have invented a new and useful Improvement inMechanical Movements, of which the following is a full, clear, and exactdescription.

My invention relates to an improved means for converting a rotary motioninto a reciproeating movement; and more particularly has for ts objectto provide simple, inexpensive and reliable mechanism, which willeconomically utilize the force of gravity afforded by a fallmg weight,and convert rotary motion produced thereby into a vertical reciprocatmgmovement, for the actuation of aplunger pump, or other device requiringsuch a movement.

To this end my invention consists in the construction and combination ofparts, as is hereinafter described and claimed.

Reference is to be had to the accompanying drawings, forming a part ofthis specification, in which similar letters of reference indicatecorresponding parts in all the figures.

Figure 1 is a broken, partly sectional side v ew of the improvementapplied to a pump. F g. 2 is an enlarged transverse sectional v1ew inpart, of details of construction embodying the improvement, on theline2-2 in F gs. 1 and 3; and Fig. 3 is abroken sectional view of completeddetails of construction, seen opposite the arrow 3, in Fig. 2.

The improvement is shown in Fig. 1, as applied to operate a commonwaterlifting pump A, and to this end is suitably mounted on a derrickframe B. The derrick frame is of a proper height for efiective service,and in completed form, not shown,is rectangular at the base, thisstructure being composed of four corner posts a, which incline an equalextent inwardly, so as to reduce the degree of their separation at theirupper ends, which are joined together by four similar cap plates 1), onebeing shown in Fig. 1. Thejunctions of the posts a with the cap plates1), are reinforced by the diagonal braces c that are extended across theupper corners of the frame,

and have their ends affixed to the parts mentioned, so as to stifien theupper part of the framed structure. Near the lower ends of the posts at,these parts are joined by the four horizontal beams d, two beingrepreupon the inclined posts a, and occupy a plane parallel with thebeams named, their degree of separation therefrom being such as willadapt them to properly receive and sustain working parts of theimprovement which consists essentiallyof features of construction whichwill be presently described. A winch drum is provided, which is securedupon a shaft g, that is rotatably supported and secured transversely ontwo of the frame pieces e, which are opposite, said drum consisting oftwo cylindrical and concentric portions h, h, the latter being ofconsiderably less diameter than the one h, said drums occupying spacebetween the parallel frame pieces whereon the shaft g, is adapted torotate. There is a large spur gear wheel i, secured on the shaft g,intermediately of the frame pieces e,which wheel meshes with a smallpinion 7o, affixed upon a counter-shaft m, which is supported to rotateon the frame pieces mentioned, parallel with, and at a proper distancefrom the shaft g.

An essential feature of the improvement consists of a comparativelylarge escapement wheel n, that is also secured on the countershaft m. Asshown in Fig. 2, the rim of the escapement wheel at, has a suitablewidth provided to permit two series of peculiarly shaped cam blocks 0 tobe formed or secured upon its peripheral surface. The cam blocks orteeth 0, are of a like form in both series, and a proper equal number isprovided for the two sets of teeth, each set or series being spacedapart correctly to adapt them for effective service. The length of eachseries of cam teeth 0 is proportioned to the breadth of the wheel facethey are projected from, so as to locate the inner terminals of each setof teeth on a circumferential line at the transverse center of saidperipheral surface, the teeth of one series being alternated in positionwith regard to those of. the other series, so as to locate themindividually at the center of the space between two teeth of the matingseries, as indicated in Fig. 2. Each cam tooth 0,projects radially aproper distance from the peripheral face of the wheel at, and the loweredges of said teeth considered on the part of the wheel face nearest tothe pump A, are similarly incurved, of a correct radius which byprolongation would intersect the upper-inner corner of the tooth. Theincurved edge portion of each tooth 0, is by preference prolonged as astraight wall, parallel with the other edge of the tooth, that forms aright angle with the edge of the wheel rim,from which the tooth islongitudinally extended.

Two timbers e are transversely extended between the frame pieces 6, andhave their ends attached to them, said timbers being properly spacedapart, parallel with each other, and designed to afford support forapump rod *r, and. the periphery of the wheel n, a crank-arm p on one endof this shaft being pivoted to the upper end of the pump rod and havinga throw adapted to properly reciprocate the latter. On the opposite endof the rock shaft 20, which is near to the circular face of thewheel n,a dual rock arm 8, is secured at its longitudinal center, producing twoaligned and similar limbs that are individually of a nearly equal lengthto that of the crank-arm 19'. One rock arm limb pro-- jects in the samedirection as the crank arm p, and consequently the other limb isoppositely extended, both of the rock arm limbs lying in the same planewith the crank arm. At an equal distance from the axis of the rock shaft19, two studs 8, are projected from the surface of the dual rock arm 8,on the side nearest the periphery of the wheel n, and near said circularface; the shaft 19 being located such a distance below the axis of thecountershaft 'm, as will permit the stud s, which is uppermost when thedual rock arm is in a vertical position, to lie nearly in a horizontalplane with the counter shaft axis, as indicated in Fig. 1. The studs 3are each provided with anti-friction thimbles that are loosely securedon them as shown in section in Fig. 3, these thimblesforming thecylindrical exteriors of the studs that are in service pallet toesWhereon the cam teeth 0, successively impinge when the device is in use.On the cap plates 1) of the derrick frame B, a shaft u, is transverselysustained,parallel with the drum shaft g, the ends of said shaft it,being rotatably engaged with two boxes u, one shown in Fig.1.

There is a grooved pulley a secured on the shaft u, on which pulley arope v is imposed, that has one end secured to the smaller band h of thewinch drum that is mounted upon the shaft g, as before explained, theother end portion of the rope '2), having a secured engagement with aseries of weights to, which are removably placed on a hanger rod to, sothat the heft of the multiple weight may be increased or diminished asoccasion may require.

On the larger portion h, of the winch drum,

another rope a2, is secured by one end, and wrapped in a suitable numberof co1ls,a portion of the rope being extended downwardly to pass througha snatch block 00', that is attached upon a transverse beam that extendsbetween the horizontal beams d, which are.

from the drum h, and the attached weights w, 1

are pendent near the base of the derrick frame, as indicated in Fig. 1.

On the rock shaft 19, near the dual rock shaft 8, a balance wheel 2;, ismounted and secured, said wheel having its rim of a diameter and weightthat will adapt it for efficient service. vided to co-act with the wheel.2, and has one of its ends secured on a cross timber e, or other properstable support, at a proper distance from the wheel a, and its free endis projected toward the latter,-passing through a slot in an arm 2 ofsaid wheel or having a like loose connection established therewith, soas to utilize the resilience of the spring for the steady oscillation ofthe wheel when the latter is periodically and rotatively moved in onedirection, and as will presently be explained.

In use, the weights to, are elevated to a point near the pulley M by amanipulation of the crank handle g so as to unwrap the rope as, from thedrum h. Or the rope 00, may be prolonged sufficiently beyond the drumshaft y, after said rope has been wrapped upon the drum thereon, so asto allow animal power to p be attached and utilized as a draft force toelevate the weight w, by unwrapping the rope :r, from the drum h, andconsequently wrapping the other rope L, on the smaller drum it. When theparts are arranged as stated, the gravity of the elevated weights in,will cause the spur wheel 1', to revolve in the direction of the arrow1, and the escapem'ent wheel n, in an opposite direction, as indicatedby the arrow 2, in Fig. 1, so that the cam teeth 0 will be successivelybrought into forcible contact with the pallet toes s. seen that theimpinge of a pallet toe byone of the pawl teeth 0, when the dual rockarm s is in its normal position, will rock the arm as A preferably flatspring a, is pro It will be gree, the curvature of the wheel rim, fromwhich the cam tooth projects, will remove the tooth from the toe. Thespring z will serve to hold the parts mentioned in assuredcontact andprevent chattering or back-lash of the pallet toe. The release of thetoe s, as just stated, will be effected when the other limb of the rockarm and its toe is projected intothe path of an approaching cam tooth 0,that is extended from the other edge of the escapement wheel 01 towardthe transverse center of the latter, so that this tooth will be engagedat the time the one of the opposite series is released, whereby thecontinued 0scillation of the dual rock arm will be efiected, and thepump A, actuated, in an obvious manner.

The mechanical movement that has been shown as operating a pump by theforce of gravity due to the falling of a weight, may be applied toactuate other machinery which requires a vertical reciprocating motion,hence it is not desired to limit the use of the novel movement to thedriving of a pump.

Having described my invention, I claim as new and desire to secure byLetters Patent 1. The combination with an upright frame, a winch drumrotatable thereon near its base, a loose pulley at the head of theframe, a rope passing from the drum over the pulley, a pendent Weight onthe rope, a counter-shaft, apinion thereon engaged by a spur wheel onthe drum shaft, and an escapement wheel on the counter-shaft, ofarotatable rock shaft at a right angle to the counter-shaft, a dual rockarm on one end of the rock shaft near the face of the escapement wheeland adapted to be alternately engaged near its ends by teeth on saidescapement wheel, and a crank arm on the other end of the rock shaft,substantially as described.

2. The combination with an upright frame, a rotatable transverse shaftthereon near its base, a winch drum on said shaft, a rope extendedupwardly from the drum and engaging a loose pulley on the head of theframe and pendent therefrom, a weight thereon, and means to rotate thedrum and elevate said weight, of a spur wheel on the drum shaft, acounter-shaft, a pinion thereon, an escapement wheel having staggeredteeth in two series, a rock shaft rotatable on the frame at right anglesto the counter-shaft, a dual rock arm near the face of the escapementwheel, pallet toes on the ends of the rock arm adapted to be alternatelyimpinged by the teeth of the escapement wheel, and a crank arm on theother end of the rock shaft, substantially as described.

3. In a mechanism supported on an upright frame, and having a rotatabletransverse shaft thereon near its base, a winch drum of two diameters,on said shaft, a rope extended upwardly from the smaller drum, andengaging a loose pulley on the head of the frame and pendent therefrom,a weight thereon, a. sec- 0nd rope engaging the larger winch drum and aWindlass shaft below the drum, and a snatch block between the drum andWindlass, the following co'aoting parts, viz: a spur wheel on the drumshaft, a counter shaft, a pinion thereon, an escapement wheel having twoseries of staggered cam teeth, a rock shaft rotatable on the frame atright angles to the counter-shaft, a dual rock arm thereon near the faceof the escapement wheel, pallet toes on the ends of the rock arm,adapted for an alternate engagement with the cam teeth, and a crank armon the other end of the rock shaft, in the same plane with the dual rocked to be alternately engaged by the duplicate 9 5 series of cam teeth, acrank arm on the other end of the rock shaft, in the same plane with thedual rock arm, and mechanism adapted to transmit the motion of adescending weight to the escapement wheel, substantially as described.

5. In a mechanism supported on a derrick frame, and having arotatabletransverse shaft thereon near its base, a winch drum of two diameters,on said shaft, a rope extending upwardly from the smaller drum andengaging a loose pulley on the top of the frame and pendent therefrom, aweight thereon, a second rope engaging the larger drum and a Windlassshaft below the drum, and a snatch block between the drum and Windlass,the following co-acting parts, viz: a spur wheel on the drum shaft, acounter-shaft, a pinion thereon, an escapement wheel having two seriesof staggered cam teeth incurved on their lower sides at their innerends, a rock shaft rotatable on the frame at right angles to the axis ofthe counter-shaft and below said shaft, a balance wheel thereon, a platespring engaging the balance wheel, a dual rock arm on the end of therock shaft near the cam teeth, two thimble-covered pallet toes on theends of the rock arm, adapted to alternately engage the cam teeth, acrank arm on the other end of the rock shaft, and an upright pumpconnected by its rod with said arm, substantially as described.

JOHN E. WEST.

Witnesses:

W. O. BENNETT, JOHN A. FIELD.

